Assessment ScoreCard – 31 Day

Assessment Scorecard headlines

All Assessments are based on an ambient background noise of between 30 and 40 dBs i.e. a quiet residential area. Typically the noise from an overflying aircraft is between 50-65 dBs. If your property is located near to a busy road i.e. 70-75 dBs, the noise impact from aircraft will be significantly reduced, whilst the road remains busy.

Note: Overflying aircraft noise typically has a duration of 30-50 seconds, the higher the plane the longer the duration. Whereas the average car, bus or HGV the duration is only a few seconds.

Date of survey

20/10/2025 09:29:05

UK Postcode Area

WELLING, LONDON, DA16 2LE

Baseline geo-coordinates

51.4603 , 0.09486

Survey type

31 days prior to: 19-Oct-2025 @23:20:42

Assessment band

INTERMITTENT

Assessment actual value

4.53

Assessment description

Will encounter some day-time noise disturbances that are caused by the volumes of planes overflying Also expect a possible visual impact too.

Band range

Lower: 4.0 --> Upper: 7.0

Volumes, Height bands, and Intensity.

For Assessment / Daily Avg. / Hourly Avg.

Count of ALL flights

1,341 / 43.3 / 2.5 ✔

Flights above 26k feet.

962 / 31.0 / 1.8 ❌ (760)

Flights between 16k and 26k feet

181 / 5.8 / 0.3 ✔

Flights between 13k and 15k feet

38 / 1.2 / 0.1 ✔

Flights between 7k and 12k feet

15 / 0.5 / 0.0 ✔

Flights between 6k and 7k feet

41 / 1.3 / 0.1 ✔

Flights between 5k and 6k feet

63 / 2.0 / 0.1 ✔

Flights between 4k and 5k feet

18 / 0.6 / 0.0 ✔

Flights between 3k and 4k feet

2 / 0.1 / 0.0 ✔

Flights below 3k feet

21 / 0.7 / 0.0 ✔

4 or more flights per hour

7 / 0.2 ✔

9 or more flights per hour

0 / 0.0 ✔

Departures between 1.5k and 15k feet

32 / 1.0 / 0.1 ✔

Time and Sleep Analysis

For Assessment / Daily Avg. / Hourly Avg.

Between Midnight and 1am

24 / 0.8

Between 1am and 2am

18 / 0.6

Between 2am and 3am

19 / 0.6

Between 3am and 4am

20 / 0.6

Between 4am and 5am

44 / 1.4

Between 5am and 6am

93 / 3.0

Between 6am and 7am

86 / 2.8

Between 7am and 8am

71 / 2.3

Between 8am and 9pm

807 / 26.0 / 1.9

Between 10pm and 11pm

36 / 1.2

Between 11pm and Midnight

30 / 1.0

Other Noise Disturbance, Vibration and Emissions factors

Avg time in seconds an aircraft remained in the airspace bubble

14 ✔

Percentage of overflying occuring Out-Of-Hours and at Weekends

72 ❌ (43)

Minimum avg. distance in miles

0.47

Number of possible disruptions by; day / out-of-hours / hour

4.0 / 3.0 / 0.2 ✔

Flight holding stack identified?

No

Altitude for all flights

29,400 ✔

Altitude of departures between 1.5k and 15k feet

13,707 ✔

Altitude of flights below 20k feet

12,123 ✔

Busiest times of day
(Distruption: 0 - low, 25+ high)

Day of week, time, frequency and number of flight events.

6.25

Sundays between 5:00 and 6:00- 2 time(s) in 4 weeks. Approx:4 flight events.

5.50

Fridays between 5:00 and 6:00- 2 time(s) in 4 weeks. Approx:3 flight events.

3.75

Saturdays between 16:00 and 17:00 - 2 time(s) in 4 weeks. Approx:3 flight events.

3.00

Thursdays between 5:00 and 6:00- 2 time(s) in 4 weeks. Approx:2 flight events.

2.50

Fridays between 13:00 and 14:00 - 2 time(s) in 4 weeks. Approx:2 flight events.

12.50

Saturdays between 6:00 and 7:00- 1 time(s) in 4 weeks. Approx:7 flight events.